我從通常以 JSON 格式提供的用戶 API 請求（來自 API 正文）中獲取一些數據有效負載。它作為字典存儲在我的 python 代碼中。"Data":{ "Ready Date":"2020-01-31T12:00:00", "Ready Time":"2020-01-31T12:00:00", "Delivery Date":"2020-02-15T12:00:00", "Service Level":"EC", "Close Time":"2020-01-31T17:00:00"}我想驗證給定的字段。如果用戶沒有給出“就緒日期”，它應該說缺少就緒日期并檢查該 JSON 中的每個對象并說明是否缺少某些內容我的代碼：我將所有字典鍵存儲在一個數組中，例如：a = ["Ready Date","Ready Time","DeliveryDate","Service Level","Close Time"]我的邏輯for value in data: if value not in a: print("value Missing" : Value) else: print("All values are entered")結果：如果我給字典和列表中的所有值都一樣，My results prints :All values are enteredAll values are enteredAll values are entered如果我從字典中刪除任何值并檢查條件，我會得到以下打印結果value missing : Ready DateAll values are enteredAll values are entered我需要避免循環并且只打印一次
1 回答
子衿沉夜
TA貢獻1828條經驗 獲得超3個贊
你不應該在沒有首先提供你嘗試過的證據的情況下提出問題（盡管你沒有提出問題你給了任務），但答案如下：
data = {
"Ready Date":"2020-01-31T12:00:00",
"Ready Time":"2020-01-31T12:00:00",
"Delivery Date":"2020-02-15T12:00:00",
"Service Level":"EC",
"Close Time":"2020-01-31T17:00:00"}
a = ["Ready Date","Ready Time","DeliveryDate","Service Level","Close Time"]
missing = [field for field in a if field not in data]
if len(missing) == 0:
print("All values are entered")
else:
[print(f"Missing value: {field}") for field in missing]
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